Plutonians Picture

Here's a relatively rare post. In honor of today's impending NASA event: a robotic visit to Pluto, I have decided to try and make something. Pluto has five total moons: Charon, Styx, Nix, Kerberos and Hydra. I tried a crack at drawing critter versions of the mythological creatures that the moons names were based off of. Can you guess which is which?